Product Overview

The R&S FSMR26 Measuring Receiver (FSMR series) is a one box solution for calibrating RF level and analog modulation parameters of signal generators and attenuation. The R&S FSMR combines the functionalities of a level calibrator, modulation and audio analyzer, power meter and spectrum analyser, all in a single instrument.

Due to its high level linearity and frequency range of up to 26.5GHz, the R&S FSMR26 is ideal for measurement tasks in calibration and test and measurement labs. The R&S FSMR26 from Rohde & Schwarz performs all measurements that are necessary for the calibration of signal generators and fixed or variable attenuators.

As a level calibrator, the R&S FSMR achieves a linearity value of 0.015 dB + 0.005 dB/10 dB, which fully corresponds to that of the current industry standard. The R&S FSMR26 offers a wide measurement range from +30dBm to -130dBm. In addition, the measurement bandwidth can be set to broad limits between 100Hz and 10MHz. During level measurements, this prevents the frequency offset or residual FM of the signal generator to be calibrated from having any effect.

All modulation parameters and the DUT's modulation generator can be calibrated solely with the R&S FSMR. A modulation analyser and an audio analyser for the analogue modulation modes AM, FM and PM are already integrated into the instrument. In addition, the FSMR is equipped with a full-featured spectrum analyzer and a power meter to which the power sensors of the R&S NRP family can be connected.

The R&S FSMR also supports power meters from other manufacturers, which it controls via an IEC\IEEE bus connection. Investments that have already been made by calibration and development departments within the military, at mobile radio manufacturers or at metrology labs are protected since they can continue to use their existing instruments.

All functional components of the R&S FSMR26 such as level calibrator, modulation analyser, audio analyser, power meter as well as spectrum analyser, and even externally connected power meters, can be operated directly via its front panel. The R&S FSMR26 also has GPIB and LAN interfaces, thus allowing convenient integration and remote control in measuring systems.

Functions combined in one instrument:

High precision level calibrator

Modulation Analyzer for AM/FM/PM

Audio Analyzer with THD and SINAD

Support for NRP power sensors for absolute power measurements

High-performance spectrum analyzer

Functions and properties tailored to the needs of calibration labs:

Very high level stability over time

Easy to use, with complete operation control from the R&S FSMR front panel

Traceable calibration

Documented calibration procedure

Specifications equal to or exceeding the HP 8902 with option 050

Specfications of the Rohde & Schwarz FSMR Measuring Receiver include:

Frequency Range: 20 Hz - 26.5 GHz

Level

Linearity: 0.015 + 0.005dB / 10 dB

Level range: +10 dBm to – 130 dBm

Modulation Measurements:

Measurement Range:

Amplitude Modulation: 0 to 100% modulation depth

Frequency Modulation: Max 500 kHz deviation

Phase Modulation: Max 10 000 rad phase deviation

Modulation Frequency:

Amplitude Modulation: 50 Hz to 100 kHz

Frequency Modulation: 50 Hz to 200 kHz

Phase Modulation: 50 Hz to 100 kHz

Uncertainty:

Amplitude Modulation: 0.5 to 1.5%

Frequency Modulation: 1 to 3%

Phase Modulation: 1%

Distortion:

Amplitude Modulation: 0.1%

Frequency Modulation: 0.1%

Phase Modulation: 0.1%

Audio Filters

Lowpass 3 kHz, 15 kHz, 23 kHz, 100 kHz

Highpass 20 Hz, 50 Hz , 300 Hz

Deemphasis 25/50/75/750 µs

Weighting filters CCITT, CCIR unweighted

Audio Input

Input impedance 50 Ohm/1 MOhm

Level range up to 4 V

Frequency range 20 Hz to 1 MHz

Internal harmonic distortion 0.1%

Spectrum Analyzer

Spectrum Analyzer R&S FSU26

Features of the R&S FSMR26 Measuring Receiver include:

Wide level range +10 dBm to – 130 dBm

Modulation analysis: Modulation depth, frequency and phase deviation

Audio analysis with automatically tuned THD and SINAD

FFT on the audio signal and on the demodulated signal

Audio spectrum and spectrum display of the demodulated signal

Time domain display of audio signal and demodulated signal

Low/high pass audio filters and demphasis

Separate audio input for calibration of audio signals

Fast RF counter with 0.1 Hz resolution

Spectrum analyzer functions as for the high performance Spectrum Analyzer R&S FSU

High immunity against drifting or unstable signals

Fully programmable via GPIB/LAN

The Rohde & Schwarz FSMR series of Measuring Receivers supports the following technologies: